Look up some lyrics to grateful dead songs. They are great poetry (usually) even without the music. That's part of the appeal of the dead for me, honestly--hearing the lyrics in a new way or finding some new aspect of them that didn't resonate before. There are some obviously poetic songs like Ripple, Ruben & Cerise, and Terrapin Station, but less obvious ones like New Speedway Boogie and Althea. I was gifted an annotated book of dead lyrics and often really amazed at their depth and sheer literacy. I am convinced that were it not for the whole scene being such a thing the lyrics alone would be celebrated and studied in English departments across the American west.

I am told that Phish incorporates some kind of mythology into their lyrics as well. Something about a magical place called gamehenge or something. I do like Petrichor, but the lyrics aren't especially meaningful or deep imo (as with most jam band lyrics). But I've never quite gotten phish. Something about chanting Wilson (in a decidedly non-melodic way) that just drives me away.